Since there has been some requests to share our ideas how to improve the game, then here is my vision of making the game a bit more captivating.
The current version of travian kingdoms lets players build their own villages that collectively make up a kingdom, but what I would like to see is that they can also build some infrastructural elements for the whole kingdom. But what could these elements be? ...Well as we know from history then the romans were famous for their roadbuilding skills and quality roads let their empire to be connected better and supply their armies on far away conquests. What if this feature could be applied to the game by having all roman players able to invest in paving their kingdoms roads so the effect would be maybe a 1% faster army and merchants traveling speed inside kindoms borders. This effect would be cumulative so if there are 20 roman players in kingdom that have built the roads buidling or maybe bought the road feature in mainbuilding or embassy then every member of a kingdom gets 20% faster traveling inside kingdom borders.
The other tribes could have an effect on overall attack strength and defense strength in a similiar manner. Or maybe gauls could slow incoming attacks down as a part of their traps feature and teutons raise defense strength.
Another idea would be a new type of troop that can also wield hero items so every village could hide troops with chicken boots or send troops between kingdom or own villages faster. This troop should be limited to 1 for every village. Another possibility is to have extra hero if primary hero reaches level 100, but that negates the effect of being able to defend every village troops on earlier stages of game.
Also some buildings outside of villages such as watchtower that could detect if the incoming attacks are real or fake from kingdom borders onward or a building, where you can hide your army so a swifter attack can be made with the downside of not having defense bonus there. Could be found out by randomly checking empty fields with a scout. These building could be built for CP by a type of troop like settler , only called an engineer.